It is not known exactly when people first came to the Americas. However,
archaeologists have ruled out the possibility that men and women evolved in the Western
Hemisphere because no fossils of pre-Homo sapiens have been found there. No remains
of the closest cousins of human beings, the great apes, have been found in the Americas, either. Despite these theories, however, many Native American groups believe that they
evolved in the Americas. These beliefs must be respected until archaeological findings are
more conclusive.
Archaeologists believe that Native Americans originally came from Asia.
Estimates of when they came to this continent vary greatly. However, some
10 archaeologists believe that people may have been in the Western Hemisphere as long as
35,000 years.
Most archaeologists use the Bering Strait theory to explain how the first people
reached the Western Hemisphere. The Bering Strait is the body of water separating
Siberia from Alaska. Archaeologists believe that at various points in prehistory this water receded and a land bridge connected present-day Siberia and Alaska. The early
ancestors of Native Americans crossed this stretch of land while hunting animals and
plants to eat. Archaeologists do not believe that these immigrants looked like present-day
Asian peoples. If we accept this theory, we can think of the ancestors of Native
Americans as physically “pre-Asian.”